Improvement in tuyeres



A. K. HERB. Tuyere.

No; 203,041. Patented April 30,1878.

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UNITED STATES PATENT OEEIoE.

ABRAHAM K. HERB, OF LAMPETER, PENNSYLVANIA.

IMPROVEMENT lN TUYERES.

Specification forming part of Letters Patent No. 203,041, dated April30, 1878; application filed February 25, 1878.

To all whom it may concern:

Be it known that I, ABRAHAM K. HERE, of Lampeter P. 0., in'the county ofLancaster and State of Pennsylvania, have invented certain Improvementsin the Construction of Ball Tuyere-Irons, of which the following is aspecification The object of this improvement in ball tuyere-irons is toobviate serious objections to the manner of molding and casting theordinary base for the forge or smith fire-hearth, as heretoforeconstructed, by doing away with the external lugs on the lower end ofthe case, as also on the sides of the frame for the door to slide in,and which is usually bolted to the bottom of the case. The reasons areherein more fully set forth.

The accompanying drawings, with the letters of reference marked thereon,and a brief explanation, will enable those skilled in the art to makeand apply my invention.

Figure 1 is a side elevation of the combination; Fig. 2, a top view ofthe case with the ball and spindle removed, also the top or cover 0.Fig. 3 shows the three-sided door-frame, and D the sliding door, withits stop P.

The only novelty in the construction of the case A is in casting aninner flange or ledge, B, on two sides, having central openings 8 h.This lodge is flush with the bottom of the case.

The three-sided frame B is also perforated centrally, for screw-bolts tomatch, so that the frame can be set on to adapt it for a right or leftside door.

I use headed screw-bolts, which pass through the sides of the frame andthe inner side flanges of the case, to which it is secured by a nut.This frame has a shouldered or depressed ledge, so as to form an openspace for the door D to slide back and forth in between it and the underside of the ledge in the case. I have also improved the greateradaptation of the ball for a smaller blast on light work, by introducinga circular opening, f, from one side, to enter the beveled central slotG H at right angles thereto.

All the cases of this class of tuyere-irons heretofore made haveexternal lugs on the outside of the lower end of the case. These cannotbe cast with a core to produce the hole for the bolt, inasmuch as theyform a separate piece in molding, and must be drawn out first; hence itis necessary to drill holes into lugs when cast, which requires extralabor, and when so cast these lugs are very liable to be broken off inrough handling, or in ordinary transportation, as well as in drilling.All these objections are overcome by having the inner ledge cast withthe case, and by doing away with the lugs on the frame and case, and tofacilitate change instead of bolting or riveting the frame to the case.The use of headed screws and nuts will be more satisfactory, so that theresult in this simple change is a combination which is more easilymolded and fitted up, and less liable to breaking in transportation, andgreatly improves this desirable class of ball tuyere-irons so much inuse.

I am not aware that such improved irons were ever before known or used;therefore,

What I claim as my improvement is- The case A, provided with the innerlower ledge or flange B, in combination with the door-frame B, withoutside lugs, and door D, the whole constructed and operating as and forthe purpose described.

ABRAHAM K. HERB.

Witnesses:

H. G. BOOK, D. K. PETERS.

